This study was carried out in two successive summer seasons (2012 and 2013), at the Experimental Farm of Research Station, Qanater El-Khairya, El-Kalupia Governorate, Agriculture Research Center. The main objectives of this investigation were to estimate of magnitude of additive and non-additive gene effects for some traits in an attempt to stablish some inbred lines. The study also aimed to estimate heterosis degree, relative to mid, better parents and the standard cultivar to determine the hybrid vigour for some important characters. Phenotypic correlation coefficients between all possible pairs of the different studied traits were estimated. The following traits were assessed: early and total yield as fruit number and weight, average fruit weight, shape index, skin and flesh colour, flesh thickness, β carotene, vitamin C and sugars contents. The obtained results showed that both additive and non-additive gene effects were involved, the additive gene effects appeared to be playing the main role in the inheritance of all studied traits, since the estimated GCA: SCA ratio values ranged from 4.4 to 57.8. None of the parents found to be good combiner for all characters. Generally the two parents Magyar Kincs and Muszkotàly were the best combiner for breeding to most characters. It is noticed that the best 1 F combinations were resulted from crossing between these two parents or between one of them and other parent.Hybrid vigour was detected for early and total yield, as well as, most fruit characters. In some crosses, high better parent heterosis and potence ratio values were given for these traits supporting the over dominance hypothesis. Other degrees of dominance were observed by many crosses concerning some traits. High estimated standard heterosis were reflected by three crosses i.e., Shahd El-Dokki X Muszkotàly, Shahd El-Dokki X Magyar Kincs and Magyar Kincs X Muszkotàly for yield and most important traits. Hence, it could be suggested that these crosses may be recommended as new promising 1 F hybrids for commercial production of melon after further evaluation. Desirable correlations were detected between many pairs of character. In many cases phenotypic correlations used to help breeders in selecting and improving quantitative of difficulty measured characters through the selection for simply and correlated ones.

to study the effect of zinc at (0, 50 and 100 ppm) and some amino acids, tryptophan at (0, 50 and 100 ppm) and methionine at (0, 25 and 50 ppm) on growth, yield, oil production and chemical composition of caraway (Carum carvi, L.) plants. The results showed that zinc application had no significant effect on plant height in the first season, number of branches / plant, dry weight / plant and number of umbels / plant in both seasons. Whereas zinc at 50 ppm significantly increased plant height and dry weight / plant in the second season. Zinc at 50 and 100 ppm significantly increased fresh weight / plant in both two seasons , fruit yield / plant and oil yield/ plant in the second one. Zinc at 50 and 100 ppm insignificantly increased oil percentage in both two seasons. Zinc at 50 and 100 ppm decreased limonine percentage in the oil and increased carvone percentage in the oil in both two seasons, total carbohydrates contents in both leaves and roots in the first season. Zinc at 50 ppm increased total carbohydrates in fruits in the first season, while 100 ppm increased it in leaves, fruits and roots in the second one. Tryptophan and methionine had a significant effect on plant fresh and dry weights in both seasons. The most effective treatment was methionine application at 50 ppm. Tryptophan and methionine at 50 ppm gave the highest fruit yield / plant in the first and second seasons, respectively. Amino acids (tryptophan and methionine) insignificantly increased volatile oil percentage and oil yield / plant in the first season. Whereas, methionine at 25 ppm significantly decreased oil percentage in the second season. Methionine at the highest rate (50 ppm) decreased limonene and increased carvone percentages in caraway essential oil in both seasons. Amino acids application increased total carbohydrates percentage in leaves in the first season, in fruits and roots in both two seasons. Interaction between zinc and amino acids (tryptophan and methionine) had a significant effect on most vegetative growth characteristics, fruit yield / plant, oil percentage and oil yield / plant, and